Revolving mortar board



p 1962 w. E. HOLT 3,055,721

REVOLVING MORTAR BOARD Filed June 15, 1961 2 Sheets-Sheet 1 INVENTOR.

Sept. 25, 1962 w. E. HOLT REVOLVING MORTAR BOARD Filed June 15 1961 4 a4/ 6V .1 z

: Z 3/ J a? a 29 424 a 7 I if j Z; T Z6 i 2 Sheets-Sheet 2 INVENTOR.

United States Patent Ofifice 3,55,7Z1 Patented Sept. 25, 1962 3,055,721REVOLVING MORTAR BOARD Walter E. Holt, Loris, S.C. Filed June 15, 1961,Ser. No. 117,455 1 Claim. (Cl. 31132) This invention relates to arevolving table or mortar board which is adapted to be used for holdingplaster, mortar or the like in order to facilitate the use of suchmaterial during various types of building or construction work.

It is a general'object of the present invention to provide a novel andimproved revolving mortar board, and more specifically it is an objectof the invention to provide a revolving mortar board which includesparts which can be readily taken apart when the device is not beingused, and wherein the top member of the revolving mortar board isadapted to be covered with a suitable matevrial such .as a suitablepiece of metal so as to insure that the mortar being supported thereonwill not become dried out by having its moisture absorbed into thewooden surface of the top member, and wherein another important objectof this invention resides in the provision of an interengaging means ona rotary top member and a post therebelow for helping to insure that therotary top member is properly centered and aligned.

The present invention has as a still further object to provide a devicewhich will be exceedingly simple in construction and may accordingly beproduced at mod erate cost.

Other and incidental objects will appear hereinafter.

In the drawings:

FIGURE 1 is a side elevational view of the revolving mortar board,constructed according to the present invention.

FIGURE 2 is a sectional view taken on the line 2-2 of FIGURE 1.

FIGURE 3 is an enlarged bottom plan view of the top member showing thetop member removed from the stand.

FIGURE 4 is a top plan view of the stand per se, with the top memberremoved.

FIGURE 5 is a sectional View taken on the line 55 of FIGURE 2.

FIGURE 6 is a fragmentary top plan view showing the position of the lugsor ears before these lugs are bent upwardly to receive the rollerstherebetween.

FIGURE 7 is a fragmentary perspective view of the center post with theguide member thereon, and with parts broken away and in section.

FIGURE 8 is a fragmentary perspective view showing the upper end of oneof the legs.

FIGURE 9'is a fragmentary perspective view showing a portion of thetrack for engagement by the rollers.

Referring in detail to the drawings, the numeral 20 indicates therevolving mortar board of the present invention which is shown tocomprise a stand that is indicated generally by the numeral 21, and thestand 21 includes a horizontally disposed lower circular base 22. Asshown in thedrawings the base 22 includes a horizontally disposedcircular portion 23 as well as a vertically disposed annular section 24which extends upwardly from the outer periphery of the circular portion23. The stand 21 further includes .a plurality of similar legs 25, andeach of the legs 25 includes an intermediate vertically disposed portion26 as well as an arcuate lower portion 27, and the lower portions 27 aresecured to the horizontally disposed circular portion 23 of the base 22as for example by means of rivets or securing elements 28. The upperportions of the legs 25 are curved as at 29, and the upper ends of thelegs 25 terminate in flat sections 30 which have apertures 31 therein,FIGURE 8, and suitable securing elements such as rivets 32 are adaptedto be extended through said apertures 31 in order to secure ahorizontally disposed ring member 33 in place contiguous to the flatsections 30.

Extending upwardly from the ring member 33 and secured thereto or formedintegral therewith are a plurality of spaced apart pairs of aperturedears or lugs 34, and a roller 36 is journaled between each pair of lugs34 by means of .an axle or pin 35, for a purpose to be later described.

As shown in the drawings there is provided a vertically disposed post 37which is arranged so that it is secured between the intermediateportions 26 of the legs 25 by means of securing elements such as thebolts 38, and the numeral 39 indicates a tapered guide member which isaffixed to the upper end of the post 37.

The numeral 40 indicates a circular top member which is rotatablysupported above the stand 21, and the top member 40 includes a main bodypiece 41 made of wood or the like, and the numeral 42 indicates a metalcovering which extends completely across the wooden main body piece 41,and a portion of this metal cover as indicated by the numeral 43 alsoextends completely around the outer periphery of the main body piece 41,and this metal material as indicated by the numerals 42 and 43 serves toinsure that moisture will not be absorbed from the mortar on the topmember so that for example the mortar will not become dried out byhaving its moisture absorbed by the wooden material 41.

The numeral 46 indicates a circular body element which is secured to thelower intermediate portion of the top member 40 as for example by meansof securing elements or screws 47, and there is provided in the centralportion of the body element 46 a recess or opening 45 which registerswith a recess 44 in the body piece 41, and these registering recesses 45and 44 are adapted to define or provide an interengaging means which issuch that the tapered guide member 39' is received therein in order tohelp maintain the top member 40 properly centered .and aligned duringthe use thereof.

There is further provided a circular track 48 which is secured to thelower surface of the top member 40, and the track 48 is provided withapertures or openings 49 whereby suitable securing elements such asscrews 50 can be extended through the apertures 49 and into engagementwith the top member 40 in order to retain the track 48 secured to thelower surface of the top member 40. The track 48 is shaped to include anannular or circular groove 51 for engagement by the rollers 36.

From the foregoing, it will be seen that there has been provided arevolving mortar board or table which is especially suitable for use inconnection with various types of building or construction work, and inuse with the parts arranged as shown in the drawings, mortar or the likeis adapted to be arranged on the top member 40, and due to the rotarysupporting means for the top member 40, the top member can be revolvedor rotated in order to bring the mortar into a convenient position inorder to facilitate the use thereof by the workmen. The device 20 of thepresent invention includes the base 22 which is constructed so that itprovides a firm support for the entire unit so as to minimize thepossibility of the device accidentally tipping over. The base 22includes the portion 23, and the lower ends 27 of the legs 25 aresecurely aflixed to the portion 23 as at 28, and the post 37 is securedbetween the intermediate portions 26 of the legs 25 as at 38. With therollers 36 journaled between the lugs 34 by means of the pins 35, andwith the track 48 secured to the lower surface of the top member 40 bymeans of the securing elements 50, it will be seen that theinterengagement between the rollers 36 and the groove 51 of the track 48serves to insure that the top member 40 can revolve or turn with aminimum amount of friction so that the top member can be readily rotatedto the desired location in order to permit the most advantageous andconvenient use of the mortar or other material thereon. The body element46 is secured as at 47 to the lower portion of the top member 40, andthe recess 45 and recess 44 in the elements 46 and 41 are of a shape andsize so as to snugly receive therein the upper portion of the taperedguide member 39 whereby this interengaging means will serve to insurethat the top member will be properly centered and aligned above thestand 21.

When the device is not being used, or when it is desired to move thedevice from place to place, the top member 40 can be readily lifted upoff of the stand 21 so that the device will occupy less space in orderto facilitate storage or movement of the device from place to place. 1

In FIGURE 6 there is illustrated a part of the ring member 33 with theapertured lugs 34 integral therewith, and FIGURE 6 shows the position ofthe lugs 34 before they are bent up to their final position as forexample FIGURE 2 shows the normal or final position of the lugs 34 whichis in a vertical plane relative to the horizontal plane of the ringmember 33.

The rollers 36 and associated parts are arranged or spaced so as toinsure that the top members 40 will have a firm support whereby the topmember will not wobble or move out of its proper position even though arelatively heavy load is .applied thereto, and the rollers 36 engage thegroove 51 to insure that the top members 40 will rotate and revolve inthe desired manner. The flat sections 30 at the upper ends of the legs25 provide a level support for the horizontal ring member 33, and thering member 33 has the lugs 34 extending upwardly therefrom whereby therollers 36 can be journaled between the lugs.

Any suitable material can be used for making the various parts orelements, and it is to be understood that the various parts can be madein different shapes or sizes as needed or desired.

It is to be noted that according to the present invention the member 39defines a pivot for the revolving top member 40, and the top member 40is readily demountable from the stand, and in addition the rollers 36are disposed about the pivot 39 as set forth in the drawings.

The axles 35 which support the rollers 36 may consist of smooth roundpins with a head on one end and an opening on the other end forreceiving a cotter key. The pedestal legs 25 are adapted to be made ofchannel iron. The guide member 39 serves to help support the center ofthe board and also aids in setting the track on the rollers.

The board of the present invention is especially suitable for use byworkmen engaged in handling plaster, tile or the like, and it is to benoted that the board consists of two pairs that can be readilyseparated, that is the top member 40 can be separated from the stand 21,and the top member can be readily separated from the stand 21 or readilyassembled thereon, and this makes it quite convenient when it isnecessary to move the device through doorways from one room to another.

4 The top portions 42 and 43 are adapted to be made of a suitablematerial such as aluminum, galvanized steel or the like in order toprevent the moisture from being absorbed out of the plaster by the wood41.

Since the board or top member 40 can rotate or revolve, the personworking with plaster, tile or the like can conveniently mix his gagingplaster in with the other plaster. This process of mixing must be doneon the mortar board, and not in the mortar box. Since the member 40 canbe turned around, it eliminates the necessity of the plaster or tile manfrom walking over staging boards, to go around the plaster board, andthis all around mixing of the materials is essential since the gagingmust be thoroughly mixed.

The present invention can be made in several different sizes as forexample a plaster board may be made thirtytwo inches high and forty-twoinches in diameter, and the tile board may be made thirty-two incheshigh and thirty inches in diameter. The stand may be twenty inches high,and the dimensions may be varied as desired or required.

Although the invention herein described is fully capable of achievingthe objects and providing the advantages hereinbefore mentioned, it isto be understood that it is merely illustrative of the presentlypreferred embodiment of the invention and that it is not to be limitedto the details of construction herein described, other than as definedin the appended claims.

What is claimed is:

A device of the character described comprising a stand embodying ahorizontally disposed circular base which includes a horizontallydisposed circular portion and a vertically disposed annular sectionwhich extends upwardly from the outer periphery of said circularportion, a plurality of similar legs each including intermediatevertically disposed portions and an arcuate lower portion which isafi'lxed to the horizontally disposed circular portion of said base, theupper portions of said legs being curved and terminating in upper flatsections, a horizontally disposed ring member secured to said flatsections, spaced apart pairs of apertured lugs extending upwardly fromsaid ring member and secured thereto, rollers journaled between saidlugs, a vertically disposed post having a portion thereof securedbetween the intermediate vertically disposed sections of said legs, atapered guide member mounted on the upper end of said post, ahorizontally disposed circular rotary top member comprising a main bodypiece having a covering extending thereover, a circular track secured tothe lower surface of said top member and said track including an annulargroove for engagement by said rollers, a circular body element arrangedbelow said top member and secured thereto, there being registeringopenings in said body element and top member for receiving therein saidguide member.

References Cited in the file of this patent UNITED STATES PATENTS705,903 Bullock July 29, 1902 913,110 Eccleston Feb. 23, 1909 1,142,480Bell June 8, 1915 2,459,017 Crew Jan. 11, 1949 2,669,117 Fuhrmann Feb.16, 1954 2,680,660 Stephens June 8, 1954

